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Whiteline Complete Watts Link Rear Suspension (05-14 Coupe)

Item 54111
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    Features, Video & Details

    • Keeps Axle Centered for Predictable Handling
    • Perfect for Street and Track Cars
    • Replaces Panhard Bar and Rear Brace
    • Adjustable Ride Height
    • Synthetic Elastomer Bushings
    • 100% Bolt On, No Welding Required
    • Fits All 2005 to 2014 Mustang Coupes

    Review & Installation Video

    Review & Install Video

    Hey I’m Justin with, and I have with me possibly one of the best live axle handling modification you can do, thanks to Whiteline’s Watts link rear suspension setup, fitting all 2005 and newer Mustangs. The Mustang’s solid rear axle has unfairly been the subject of much criticism over the years, and is oftentimes considered to be the weak point of handling performance. The truth is, the modern live axle can be just as good as an independent rear setup, given a little help, that help comes in the form of this Watts link from Whiteline. The Watts link is designed to replace the factory Panhard setup in your Mustang and prevent any lateral or side to side movement of a rear axle. Even though the Watts link and the Panhard bar are essentially one of the same, the Watts link is a far superior design. The Panhard bar mounts to one end of the chassis, and connects to the far side of the axle, and while yes, this does do a great job of preventing any lateral movement, the Panhard bar does have one flaw, vertical movement. When the suspension moves up and down, the Panhard bar has the tendency to move in an arc, rather than up and down, this can result in an varying roll center which basically translates into less handling predictability, coming into or out of a turn. The design of Whiteline’s Watts link allows the rear axle to move up and down, thanks to these 2 arms that mount to each side of the chassis, and pivot right here at the diff cover. This allows the roll center to remain constant no matter what the car is doing, turning, centering, it all translates to increased handling predictability, and a more stable, planted rear end. Taking a closer look you can see this total package from Whiteline is no joke, almost the entire thing has been constructed using quality 4130 chromoly steel, and features Whiteline’s unique elastomer bushings. Perhaps one of the biggest features of this kit besides the full adjustability, is the fact that it includes a brand new diff cover, making this product a 100% bolt on affair. Because this kit does bolt on, the install really isn’t all that bad, and can be accomplished in the garage on a Saturday or Sunday afternoon. Keep in mind, since the factory diff cover will be coming off, make sure you have a drain can on you to capture all that fluid when you do crack the pumpkin. With that said, make sure you have a couple of quarts of fluid to fill the diff back up when everything is installed. When it’s all said and done, you should be wrapped up in about 4 or 5 hours. So if you’re the type of Mustang owner who prefers the twisty back roads or autocross track to the drag strip, and you want to take your live axle car to the next level, then be sure to check out this complete Watts link system from Whiteline, available right here at

    Perfect For Street And Track. The Whiteline Watts Link Rear Suspension allows the axle to move up and down in a true vertical plane keeping it centered under the car, so that your roll center behaves exactly the same in a Left Side turn as it does in a Right Side turn. This allows for predictable and tune-able handling, perfect for street and track cars.

    Adjustable. Whiteline designed their Watts Link Rear Suspension Kit to be ride height adjustable so you can precisely dial in your optimum settings through the differential cover and 4130 Chromoly adjustable arms.

    Synthetic Elastomer Bushing. This Whiteline Performance Watts Link Rear Suspension Kit uses Synthetic Elastomer bushings which reduce noise, vibration and rigidity to the rear end without the harshness of commonly used rubber bushings.

    Bolt-on Design. Unlike other Watts Linkage kits on the market the Whiteline Performance kit is a true 100% bolt on with no welding required for installation.

    Application. Designed to fit all 2005 to 2014 Mustang coupes, including the V6, GT, Bullitt and Shelby GT500 models, the Whiteline Performance Complete Watts Link Rear Suspension requires removal of the factory panhard bar and rear brace.

    Fitment: 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Details

    MPN# KDT916

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Differential Cover
    • (1) Magnetic Plug
    • (1) Standard Plug
    • (1) Main Brace
    • (1) Center Pivot
    • (2) Swivel Foot Bolts
    • (2) Swivel Foot Retaining nuts
    • (4) M12x30 Bolt
    • (1) M12x20 Bolt
    • (1) M14x80 Bolt
    • (1) M12 Grub Screw
    • (5) M12 Flat Washer
    • (1) M14 Flat Washer
    • (1) Center Pivot Retainer
    • (10) Differential Cover Retaining Bolts
    • (10) Retaining Bolt Washers
    • (2) Linkage Arms
    • (8) Arm Bushings
    • (2) M12x40 Arm Retaining Bolts
    • (2) M12 Flat Washer
    • (2) Center Pivot Arm Retainers
    • (1) Driver Side 37mm Crush Tube
    • (1) Passenger Side 60mm Crush Tube
    • (1) Passenger Side Retainers
    • (1) Passenger Side Brace Spacer
    • (1) Chassis Support Brace
    • (1) Driver Side Drop Bracket
    • (1) M10 Flat Washer
    • (2) M10x20 Bolt
    • (1) M12x70 Bolt
    • (1) M12 Hex Nut
    • (2) M12 Washer
    • (1) Spring Washer
    • (1) Fuel Line Relocation Clamp
    • (1) Self-Tapping Screw
    • (2) Grease Satchel
    Installation Info
    Tech Specs
    Will it fit my Mustang?
    • Boss 302 - 12, 13
    • Bullitt - 08, 09
    • GT - 05, 06, 07, 08, 09, 10, 11, 12, 13, 14
    • GT500 - 07, 08, 09, 10, 11, 12, 13, 14
    • V6 - 05, 06, 07, 08, 09, 10, 11, 12, 13, 14

    Note: This item only fits 2005-2014 Mustang coupes

      Customer Photos (27) Submit Your Photo

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        Questions & Answers (22)

        5 Top Rated Questions

        Will this fit on a V6 differential?

        • The Whiteline Complete Watts Link Rear Suspension will fit V6 models equipped with the 8.8" rear differential. 7.5" differential cars will be incompatible.

        Helpful (3)

        Can I use this with the BMR Xtreme Rear Sway Bar Kit?

        • The Whiteline Complete Watts Link Rear Suspension will work with the BMR Xtreme Rear Sway Bar Kit

        Helpful (3)

        Swarr Bar compatible? Can a swarr bar be installed along side the watts link setup? swarr bar Item # 80801 for reference Thanks

        • Yes the Swarr rear end support will fit with this Watts Link. The Swarr support sits below the differential and out of the way of the Watts Link.

        Helpful (3)

        2013 GT500 fitment. Can you explain how the oil lines from the track package work with this? Very interested but not getting how the watts link will work with this setup.

        • The Whiteline Complete Watts Link Rear Suspension would not be compatible with the Differential Cooler.

        Helpful (1)

        will it fit to Ford Performance Rear Sway Bar M-5490-A ?

        • Yes, The Whiteline Complete Watts Link Rear Suspension will indeed work with a Ford Performance Rear Sway Bar (M-5490-A).

        Helpful (1)
        10 More Questions
        I have a 2013 GT500 equipped with the SVT Track Package so it has oil lines that connect to the rear differential cover for the purpose of pumping the differential oil to the front where the oil is cooled and then returned back to the rear differential. Does this Watts Link allow the oil lines from the Track Pack to connect to the new differential cover? 1 answer
        The description says "adjustable ride height." This isn't what I'm thinking is it? I mean can it lower the car or is this something else? Thanks! 1 answer
        Will this fit a 2006 GT convertable 1 answer
        I would like to know if this is one piece or can be disassembled? Would also like to know the final package dimension. Thanks, Jeff 1 answer
        Ok, this is not for convetible, i get it. so if i want to have (about) the same effect with this product, what would be the alternative? I mean for convertible. please link me from the product in thanks! 1 answer
        do i HAVE to drill anything for this job, because i dont drill on my car 1 answer
        I have a 2013 GT with the track package. Will this work with the track pack or will I need to choose between the two? And if not, then which is better, the whiteline or the track pack? I currently have 3.15 gears but am upgrading to 3.73. It's automatic if that makes any difference. Only one leg so cant drive stick very well. 1 answer
        Would this product be compatible with an air ride suspension? 1 answer
        Can I use this watts link with a RTR rear swaybar? 1 answer
        I have a 2007 convertible GT. Why does the watts link fit coupes only? What's the difference? 1 answer

          Customer Reviews (19) Write a Review

          Overall Rating 4.8

          out of 5 stars

          Installation Time:Full Day

          Installation Cost:$250-$500

          • Handling Improvement 4.842105 4.8
          • Fit 4.842105 4.8
          • Bang For Your Buck 4.631579 4.6

          • 5/5

            Installation Time: Afternoon

            December 19, 2018

            Mustang GT Whiteline Watts link

            Amazing product fit to finish. Well fabricated. The powder coating looks great. Definitely check out Whiteline products before buying anything else for your suspension


            Year: 2013 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Full Day

            December 17, 2018

            Whiteline watts

            Awesome product, makes the body and chassis feel more like one . It took out the body sway in the twisties and When accelerating hard rowing through the gears. Before the watts system It felt more loose on one side than the other and it removed that feeling. It’s now solid when banking left to right. Only complaint is I had no instruction with the kit. it also took a lot more than just 2 qts of diff fluid to fill if your going to fill it untill it comes out the top plug hole on the diff cover so grab extra. I would say time to install a full day because I broke most the tools needed trying to get the car apart and also broke a bolt when torquing some of them down. It is an easy install tho It just took time. Well worth it and it looks sexy


            Year: 2014 Submodel: GT

            Helpful (1)

          • 4/5

            September 02, 2018

            Quality watts link with a few minor issues

            Was very excited to install a watts link on my car so it would handle better and keep the rear axle centered. I went with the whiteline unit because it looks the best out of all the watts links for the s197 in my opinion, and it has a good reputation with companies like vorshlag using it with good results. Install wasn't too bad, although the instructions tell you to do things a bit backwards. Best way to do it is to get the diff cover installed and fill it with fluid before connecting the rest of the components. I did run into one issue while installing the center pivot support. The bolt just to the left of the center pivot (M12 x 20mm) is supposed to be torqued to 40 ft*lbs per the instructions. I followed these instructions and ended up stripping the bolt hole. Searched the forums and this seems to be a common issue with this watts link. Luckily I was able to get a slightly longer bolt from the local hardware store and there were still some threads left in the hole that I was able to tighten it sufficiently. So if I had to do it all over again I would not torque that bolt and just put some loctite on it and get it tight with a 3/8" drive socket. Another pain was getting the arms adjusted after everything was installed. The driver's side bar is easy to adjust, the passenger side, not so much. Tightening the jamb nuts was a pain, but I finally got it. Its easier to tighten them if you remove the support brace, which i did. I haven't had a chance to test the watts link much but I think I can tell a bit of a difference when going over bumps. This is definitely not a cheap mod, but its worth it to get rid of the negative aspects of having a solid rear axle car.


            Year: 2014 Submodel: GT

            Helpful (6)

          • 5/5

            July 15, 2018

            Wheel hop nonexistent

            Mustang came with Watts Link, put about 60 thousand miles on it, hard launches, rolling burnouts, San Diego back roads (Sunrise Highway). Car stays planted, good set up with the orange Koni Shocks and Struts. Look on YouTube at Dude in Blue Watts Linkage. Must on live axle Mustangs


            Year: 2012 Submodel: GT

            Helpful (10)

          • 4/5

            Installation Time: Weekend

            June 30, 2018

            Not as easy you might think

            Not totally satisfied with the quality. Took me far longer then it should of. Screwing the bolts in to the rear end cover felt like I was cutting new threads the whole way in. One actually stripped out the threads, the bolt never got tight enough to stop the washer from spinning freely. Had to tap the hole with 1/2 tap and a1/2 inch bolt cut down enough to not bottom out. Then the brace was too long or the holes not drilled in the right place. Had to drill and file the holes to get the passenger side holes to line up. Other then that every thing else went smoothly. Looks good and did improve the handling. Would buy again but I now know what I am getting.


            Year: 2010 Submodel: GT

            Helpful (10)

          • 4/5

            May 16, 2018

            Nice Addition

            Install was straight forward. I was very pleased with the ride and handling. The best way I can describe it was that the car felt smoother thru the corners. I haven't experienced any additional noise but I probably only have 500 miles on the car since the install. Great looking but you will never see it.


            Year: 2005 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Full Day

            May 10, 2018

            Does not work with steeda sway

            This was the best suspension mod to date; however i had to modify the passenger side link for my steeda sway bar to make it all work. Either plan ahead for this and get one that works or be prepared to do some grinding. Therefore, install time took me longer.


            Year: 2013 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Full Day

            March 11, 2018

            Whiteline wattslink,great

            The setup isgreat and took me a little to long for a first time install, the Instructions are straight forward. Since it was my first try kept forgetting, not to jump ahead of steps. The stock fill plug is useless since new cover has a filler plug in back. Took longer to fill oil. But after a long day the car feels different. Great. Now I know it is great investment, now I can lower my mustang.


            Year: 2013 Submodel: GT

            Helpful (8)

          • 5/5

            October 19, 2017

            Predictable Handling, Great Product

            The fit and finish of this kit is great. I really like the planted feel of the car as I'm cornering now, and the look of the kit under the car is awesome!


            Year: 2008 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            August 24, 2017

            Best modification available!!

            So first of all, the install was not too terrible what so ever. I was alone and it took my four hours with a jack 2 stands and all hand tools. Make sure you get diff fluid before you begin the install though! That aside, I don't know why Ford let their mustangs leave without this product on the car. It's absolutely transformed the feel. It's more comfortable on the freeway and around town, way more predictable in corners, and turns absolutely amazing. 5 star no brainer.


            Year: 2014 Submodel: V6

            Helpful (12)

          • 5/5

            Installation Time: Afternoon

            May 29, 2017

            Feels like a different car

            Give yourself a full day to install this and take your time. Read the instructions prior and obtain all of the required tools and products required to keep your stress level at zero. Save all of the factory hardware because you will need to reuse some of it. The instructions are a little vague in some areas but if you have any mechanical ability you will be able to get through it with no problems. The fit and finish it top notch. The ride feels much smoother, better held together and even dampened. I took it on some hill climb twisty's and felt very confident. It's still new to me but I'm loving it so far!


            Year: 2012 Submodel: GT

            Helpful (10)

          • 5/5

            Installation Time: Afternoon

            July 18, 2015

            No more floating

            I had a 07 gt with sr lowering springs, great upgrade for the floating feeling. But with the watts link and sr springs on my 2011 gt, its the best thing i have ever felt in any mustang i drove, and i have not bought sway bars yet and it handels this good, i can take a conner on the free way 65 wen it reccomeds 35, it is a night and day diffrinece. It may be pricy but it is worth it.


            Year: 2011 Submodel: GT

            Helpful (6)

          • 4/5

            Installation Time: Afternoon

            September 26, 2014

            Whiteline Watts

            I installed this Watts Link as the last handling mod. It should have been my first. Install took about 4 hours including jacking the car. No portion of the install is difficult but you will need 2 qts of rear gear oil. I recommend Royal Purple (75w-140). You can tape string and a couple of heavy washers as plumb bobs to the rear fenders after install and adjust the links until both rear wheel lips measure flush with the plumb bobs to ensure the equal adjustment of the rear wheels post install. The Watts Link cleaned up the sometimes twitchy rear end during corner exit and allowed me to use the supercharger's boost earlier on the corner exit. The rear is more stable mid corner over bumps. Unlike some handling modifications, this one is totally silent over bumps. Additionally, it allows you to run 11 and 12 inch wide wheels without concerns related to contact with the inner fender well like the panhard bar does. It was a good addition. I know it is expensive but it truly is a quality piece of art.


            Year: 2012 Submodel: GT Dupont, WA

            Helpful (12)

          • 5/5

            Installation Time: Afternoon

            May 02, 2014

            It was what this car was missing!

            This watts link was pretty straight forward to install as long as you took your time. The fit and finish are incredible and the adjustability is easy. The ride is so much more controlled now. Still waiting for the next track day thou to see how well it handles in race day conditions.


            Year: 2012 Submodel: GT Alexandria, LA, USA

            Helpful (6)

          • 5/5

            Installation Time: Full Day

            October 24, 2013

            Whiteline Watts link

            The unit came well boxed and undamaged, the unit was in excellent condition. The instructions could be a bit clearer, installation was relatively straight forward as long as you have all the necessary tools, installation took me about 6 hours. The handling improvement however was huge, I love the way it handles out on curvy country roads, the axle hop is all but gone, and in its place is nothing but confidence. I highly recommend it, sure it's a bit pricey, but if you detest the mid corner jitters of the solid rear axle then this is the upgrade you need.


            Year: 2006 Submodel: GT Texas

            Helpful (9)

          • 5/5

            Installation Time: Full Day

            July 30, 2013

            Best mod I have ever made

            My mustang has always been an odd one to my friends simply because Im so suspension crazy. This mod is by far the best thing I have ever done. Coupled with my sway bars and coilovers my mustang handles like a beast now. My suspension is not the limiting factor in my handling anymore, i actually need stickier tires to keep up with the rest. The install did take all day and I seriously mean all day. The instructions are eh and some of their torque numbers are wrong. That and they tell you to torque certain items after you have bolted other sections in and the spare tire well makes it impossible. So you have to think ahead of the instructions a bit. Otherwise the fitment was amazing. I have the eibach sway bars and ground down part of the new panhard brace that could have come into contact with my endlinks but the unit didnt, even when not under load which was awesome. TL;DR this is the best money I have ever spent on my mustang. If you like going on twisty roads and you are sick of getting lip from your import friends, get this


            Year: 2006 Submodel: GT Bay Area, CA

            Helpful (9)

          • 5/5

            Installation Time: Weekend

            March 10, 2013

            Outstanding product, great ride improvement

            First, the pros: Great looks and clean packaging under the car. Compatible with my Ford Racing sway bar. Very nice to have additional fill and drain plugs on the differential cover. The lower drain plug has a magnet as well to capture metal shards. I couldn't believe how much this helped the ride and handling. Simply driving down the highway I can feel how much more settled down the rear end of the car feels. Others have describe it as better damped, and I would agree. The rear end "wiggle" that accompanied bumps before the install is nearly completely gone. Other users aren't lying when they say it feels more like an IRS setup: bumps on one side of the car have much less effect on upsetting the car overall. After two weeks, the Whiteline bushings are living up to their hype of no NVH added. All parts of the watts link appear top notch and very solid. After two weeks of daily driving on some bad local roads and nothing appears to be in danger of coming loose. The cons: Expensive, even when you ignore that other watts link products cost more (but worth it). Adjustments are more complex than an adjustable panhard bar. The upper right control arm is difficult to reach in order to make adjustments. The car needs to be jacked up and the rear axle allowed to hang. Even then, the jam nut on the upper right control arm is hidden by the passenger side sheet metal that it attaches to (where the panhard bar brace used to attach to). Getting a wrench in there is a pain. I had some issues with incorrect torque values in the directions. Whiteline has updated their online directions and they replaced all broken hardware that resulted, but it was a major headache. I highly recommend that you reference the factory torque values for all factory bolts that you reuse. They should now match Whiteline's directions, but it'll keep you safe. Neutral issues: Only two ride height adjustments (Steeda and Fays offer a lot more). I call this a neutral issue because I don't track my car and probably will never notice the difference. My Ford Racing rear sway bar is compatible, but it does contact the watts link if I raise the vehicle and let the rear axle hang. I can either let it do this, or disconnect the sway bar. Not a deal breaker, but another added step when working on the car.


            Year: 2008 Submodel: GT Louisiana, USA

            Helpful (27)

          • 5/5

            Installation Time: Less than 1 Hour

            March 07, 2013

            Whiteline watts link

            Notice improvements a block of driving the rear is planted an takes bumps a lot better. Launch at 4000 rpms. An it's squat an go no more wheel hope. In turns lets just say my buddy's M3 couldn't keep up. You feel the back lose grip before it does so your already adjusting an it just grips. White line will be the rest of my suspension parts they seem to have it figured out. I dive my car daily an I'm always smiling in turns. Going a lot faster then posted. Thanks White line look forward to buying the rest of your parts.


            Year: 2012 Submodel: V6 Chicago, IL, USA

            Helpful (15)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            February 06, 2013




            Year: 2012 Submodel: GT500 EDISON,NJ

            Helpful (11)

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